放射源^(226)Ra和^(133)Ba的衰变γ能谱分析  

Decay γ Spectrum Analysis of Radioactive Sources ^(226)Ra and ^(133)Ba

作　　者：许旭 常艺 陆景彬[1] 刘佳强 马克岩 唐婉月 XU Xu;CHANG Yi;LU Jingbin;LIU Jiaqiang;MA Keyan;TANG Wanyue(College of Physics,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学物理学院,长春130012

出　　处：《吉林大学学报（理学版）》2018年第4期979-985,共7页Journal of Jilin University:Science Edition

基　　金：国家重大科学仪器设备开发专项基金(批准号:2012YQ240121);长春市科技局地院(校;所)合作专项基金(批准号:17DY023)

摘　　要：采用p型同轴高纯锗探测器测量含^(226) Ra的荧光仪表盘与标准源^(133) Ba的衰变γ能谱,并分析特征γ射线的能量和强度.结果表明:^(226) Ra能谱中出现^(226) Ra的特征γ射线及大量^(226) Ra的衰变子核的特征γ射线;^(133)Ba谱中出现^(133)Ba特征射线及大量和峰,由计数率随距离变化关系及γ射线级联关系证明存在和峰.The p-type coaxial high-purity germanium detector was used to measure the decay γ energy spectrum of ^226Ra which came from fluorescent instrument panel and ^133Ba standard source,the energy and intensity of characteristic γ -rays were analyzed.The results show that the characteristic rays of ^226Ra and a large number of characteristic γ rays of the decay daughter nucleus of ^226Ra appear in the ^226Ra spectrum.There are large number of sum peaks in ^133Baγ spectrum except its own characteristic rays.The existence of sum peaks is proved from the relationship between counting rate and distance and γ ray cascade.

关 键 词：衰变γ能谱 特征射线 和峰 计数率 

分 类 号：O571.3[理学—粒子物理与原子核物理]